Year	Percent change (Units)
1993	-7.600
1994	-11.700
1995	-11.084
1996	2.776
1997	11.434
1998	8.442
1999	3.354
2000	5.760
2001	4.717
2002	5.048
2003	7.033
2004	11.439
2005	9.452
2006	10.001
2007	8.637
2008	10.235
2009	0.168
2010	7.805
2011	5.290
2012	1.629
2013	0.962
2014	1.686
2015	-3.830
2016	-2.536
2017	2.541
2018	3.138
2019	1.446
2020	-0.673
2021	2.439
2022	-4.698
2023	3.882
2024	2.401
2025	1.149
2026	1.326
2027	1.269
2028	1.247
2029	1.067